Essential checks before buying a second-hand family car

Start with the paperwork, not the paintwork

A second-hand family car has to do more than look smart on your drive. It needs to get children to school, survive the school run, swallow a pushchair and a weekly shop, and still feel safe on a wet motorway at half term. That is a tall order for any car, and the difference between a dependable workhorse and a money pit usually comes down to how carefully it has been maintained.

Before you fall for shiny alloy wheels or a tempting price, spend an hour on the history. It is the cheapest part of the buying process and the one that saves families the most money. A car with a complete, verifiable paper trail is almost always worth more than an identical one with gaps. Here is what to check, in the order that matters most.

Read the service history properly

A stamped book or a folder of invoices is a good start, but the detail is what counts. Look for the date, the mileage and the garage on each entry, and check the mileage rises sensibly between visits. If a car was serviced every 12,000 miles and then suddenly skipped 25,000 miles, ask why.

What you want to see depends on the fuel and engine type:

• Petrol cars: regular oil and filter changes, spark plugs at the correct interval, and a cambelt change if the engine uses one (often every 60,000–100,000 miles or five to ten years).
• Diesel cars: evidence of fuel filter changes, and confirmation that the car has done longer journeys rather than a lifetime of short town trips, which clog particulate filters.
• All cars: brake fluid every two years, coolant changes at the recommended interval, and a fresh air filter now and then.

Receipts for tyres, batteries and brakes are a bonus. They show an owner who fixed things when they needed fixing rather than waiting for them to fail. If the seller cannot show you anything, treat the car as unserviced and price the work in.

Dig into the MOT records

Every car over three years old in the UK has an MOT history you can look up for free using the registration number and the document reference from the V5C. This is where honest cars and neglected ones separate.

Read the advisories, not just the passes and fails. Repeated notices about corroded brake pipes, worn suspension bushes, leaking shocks or tyres close to the limit tell you the owner kept doing the minimum. One or two minor advisories that were clearly fixed before the next test are normal. The same fault flagged year after year is a warning.

Also check the mileage recorded at each test. An inconsistent jump, or a car that has covered very little over several years, deserves questions. On the V5C, make sure the seller's name and address match where you are viewing the car, and check the chassis number stamped under the bonnet or in the door shut matches the document.

Tyres tell you a lot about an owner

Tyres are the only thing connecting your family to the road, and they are the quickest way to judge how a car has been treated.

• Tread depth: the legal minimum is 1.6mm across the central three-quarters of the tyre, but for a family car aim for at least 3mm. Anything less and you are budgeting for a set immediately.
• Age: look for the four-digit date code on the sidewall (for example, 2521 means the 25th week of 2021). Rubber hardens with age, so tyres over eight to ten years old should be replaced regardless of tread.
• Matching: a decent brand across all four corners suggests care. A budget tyre on one corner next to three premium ones often means a puncture was fixed cheaply.
• Condition: uneven wear points to suspension or alignment problems, and bulges or cracks mean the tyre is scrap.

While you are crouched down, check the brakes through the wheel spokes and look for scoring or deep lips on the discs. Ask when the pads and discs were last replaced, and get it in writing.

The viewing and test drive

See the car in daylight, on dry ground, and never rush. Start it from cold and listen for rattles, whines or a sluggish turn-over. Check the coolant and oil levels, look for leaks under the engine, and have a good sniff for a sweet smell that might mean a coolant leak.

Inside, test everything your family will actually use: air conditioning, all windows, every seatbelt, the rear seats folding down, the boot floor, and the child seat anchor points. A car with ISOFIX mounts in the outer rear seats is far easier for daily life. Then drive it for at least twenty minutes, including a stretch of faster road. It should track straight, brake without pulling, and change gear smoothly. Any warning light that stays on after start-up is a reason to walk away or renegotiate.

Budget for the first year, not just the price

Whatever you pay, set aside a few hundred pounds for the first twelve months. A service, an oil change, a pair of tyres or a new battery is normal on a used car, and knowing that in advance keeps family budgets steady. A pre-purchase inspection by an independent mechanic costs a fraction of a major repair and is money very well spent on anything over a few thousand pounds.

Buy the best history you can find rather than the lowest mileage, and you will end up with a car that quietly does its job for years.